Stemgent Stemfactor LIF, Mouse Recombinant

Code: 03-0011-base
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Mouse LIF is a lymphoid factor that promotes long-term maintenance of the pluripotency of mouse embryonic stem cells by suppressing spontaneous differentiation1,2. Leukemia Inhibitory Factor (LIF) has additional functions such as cholinergic neuron differentiation, bone and fat metabolism, mitogenesis of certain factor dependent cell lines and promotion of megakaryocyte production in vivo. Mouse LIF is an approximate 20 kDa protein containing 202 amino acid residues.

Product Name

Stemfactor LIF, Mouse Recombinant

Catalog Number



  • 1 mL, 10 µg/mL (03-0011)
  • 1 mL, 100 µg/mL (03-0011-100)


Greater than 98% by SDS-PAGE analysis.


LIF is supplied as a 0.22 µm sterile filtered liquid in PBS containing 1% w/v BSA as carrier.

Storage and Stability

LIF is shipped at room temperature. Concentrated LIF is stable for up to 6 months from date of receipt when stored at 4 °C. Prior to use dilute LIF in sterile tissue culture media, aliquot to a convenient concentration, and store at 4 °C. Avoid freeze-thaw cycles as it can result in loss of activity.


Tested to be negative for mycoplasma by PCR and microbial contamination by a sterility test.

Recommended Usage

  • 1 mL of mouse LIF with the specific activity of 1×106 units/ml is sufficient to treat 1 L of embryonic stem cell culture media.
  • 1 mL of mouse LIF with the specific activity of 1×107 units/ml is sufficient to treat 10 L of embryonic stem cell culture media.


  • 10 µg/mL (Cat. No. 03-0011)
  • 100 µg/mL (Cat. No. 03-0011-100)


E. coli

Endotoxin Level

Less than 1 EU/µg of LIF as determined by the LAL method.

Biologic Activity

Mouse LIF activity is assessed by its ability to decrease the proliferation of M1 myeloid leukemia cells. The specific activity is 1×106 units/mL (Cat. No. 03-0011) and 1×107 units/mL (Cat. No. 03-0011-100), where 50 units is defined as the amount of mouse LIF required to decrease proliferation of M1 cells suspension by at least 50%.

  1. Niwa, H., Ogawa, K., Shimosato, D., and Adachi, K.) A parallel circuit of LIF signalling pathways maintains pluripotency of mouse ES cells. Nature 460: 118-122 (2009).
  2. Xu, J., Wang, F., Tang, Z., Zhan, Y., Zhang, J., Yan, Q., Xiong, Y., Xie, X., Wu, J., and Zhang, S. Role of leukaemia inhibitory factor in the induction of pluripotent stem cells in mice. Cell Biol Int 34: 791-797 (2010).
  3. Fukunaga, N., Teramura, T., Onodera, Y., Takehara, T., Fukuda, K., and Hosoi, Y. Leukemia inhibitory factor (LIF) enhances germ cell differentiation from primate embryonic stem cells. Cell Reprogram 12: 369-376(2010).
  4. Metcalf D. The unsolved enigmas of leukemia inhibitory factor. Stem Cells 21: 5-14 (2003).
  5. Williams, R.L., Hilton, D.J., Pease, S., Willson, T.A., Stewart, C.L., Gearing, D.P., Wagner, E.F., Metcalf, D., Nicola, N.A., and Gough, N.M. Myeloid leukemia inhibitory factor maintains the developmental potential of embryonic stem cells. Nature 336: 684-687(1988).
  6. Metcalf, D., Hilton, D.J., and Nicola, N.A. Clonal analysis of the actions of the murine leukemia inhibitory factor on leukemic and normal murine hemopoietic cells. Leukemia 2: 216-221(1988).

Additional Publications